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libperf: Add perf_evlist__reset_id_hash() 

Add the perf_evlist__reset_id_hash() function as an internal function so
that it can be called by perf to reset the hash table.  This is
necessary for 'perf stat' to run the workload multiple times.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20210225035148.778569-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
master
Namhyung Kim 2021-02-25 12:51:47 +09:00 committed by Arnaldo Carvalho de Melo
parent 034f7ee130
commit e2a99c9a9a
2 changed files with 11 additions and 4 deletions
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13
tools/lib/perf/evlist.c
View File

@ -26,13 +26,10 @@
void perf_evlist__init(struct perf_evlist *evlist)
{
int i;
for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
INIT_HLIST_HEAD(&evlist->heads[i]);
INIT_LIST_HEAD(&evlist->entries);
evlist->nr_entries = 0;
fdarray__init(&evlist->pollfd, 64);
perf_evlist__reset_id_hash(evlist);
}
static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
@ -237,6 +234,14 @@ static void perf_evlist__id_hash(struct perf_evlist *evlist,
hlist_add_head(&sid->node, &evlist->heads[hash]);
}
void perf_evlist__reset_id_hash(struct perf_evlist *evlist)
{
int i;
for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
INIT_HLIST_HEAD(&evlist->heads[i]);
}
void perf_evlist__id_add(struct perf_evlist *evlist,
struct perf_evsel *evsel,
int cpu, int thread, u64 id)

2
tools/lib/perf/include/internal/evlist.h
View File

@ -124,4 +124,6 @@ int perf_evlist__id_add_fd(struct perf_evlist *evlist,
struct perf_evsel *evsel,
int cpu, int thread, int fd);
void perf_evlist__reset_id_hash(struct perf_evlist *evlist);
#endif /* __LIBPERF_INTERNAL_EVLIST_H */